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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Linker script for vsyscall DSO. The vsyscall page is an ELF shared | |
3 | * object prelinked to its virtual address. This script controls its layout. | |
4 | */ | |
5 | ||
6 | /* This must match <asm/fixmap.h>. */ | |
7 | VSYSCALL_BASE = 0xffffe000; | |
8 | ||
9 | SECTIONS | |
10 | { | |
11 | . = VSYSCALL_BASE + SIZEOF_HEADERS; | |
12 | ||
13 | .hash : { *(.hash) } :text | |
14 | .dynsym : { *(.dynsym) } | |
15 | .dynstr : { *(.dynstr) } | |
16 | .gnu.version : { *(.gnu.version) } | |
17 | .gnu.version_d : { *(.gnu.version_d) } | |
18 | .gnu.version_r : { *(.gnu.version_r) } | |
19 | ||
20 | /* This linker script is used both with -r and with -shared. | |
21 | For the layouts to match, we need to skip more than enough | |
22 | space for the dynamic symbol table et al. If this amount | |
23 | is insufficient, ld -shared will barf. Just increase it here. */ | |
24 | . = VSYSCALL_BASE + 0x400; | |
25 | ||
26 | .text.vsyscall : { *(.text.vsyscall) } :text =0x90909090 | |
27 | ||
28 | /* This is an 32bit object and we cannot easily get the offsets | |
29 | into the 64bit kernel. Just hardcode them here. This assumes | |
30 | that all the stubs don't need more than 0x100 bytes. */ | |
31 | . = VSYSCALL_BASE + 0x500; | |
32 | ||
33 | .text.sigreturn : { *(.text.sigreturn) } :text =0x90909090 | |
34 | ||
35 | . = VSYSCALL_BASE + 0x600; | |
36 | ||
37 | .text.rtsigreturn : { *(.text.rtsigreturn) } :text =0x90909090 | |
38 | ||
c60c3906 | 39 | .note : { *(.note.*) } :text :note |
1da177e4 LT |
40 | .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr |
41 | .eh_frame : { KEEP (*(.eh_frame)) } :text | |
42 | .dynamic : { *(.dynamic) } :text :dynamic | |
43 | .useless : { | |
44 | *(.got.plt) *(.got) | |
45 | *(.data .data.* .gnu.linkonce.d.*) | |
46 | *(.dynbss) | |
47 | *(.bss .bss.* .gnu.linkonce.b.*) | |
48 | } :text | |
49 | } | |
50 | ||
51 | /* | |
52 | * We must supply the ELF program headers explicitly to get just one | |
53 | * PT_LOAD segment, and set the flags explicitly to make segments read-only. | |
54 | */ | |
55 | PHDRS | |
56 | { | |
57 | text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */ | |
58 | dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ | |
c60c3906 | 59 | note PT_NOTE FLAGS(4); /* PF_R */ |
1da177e4 LT |
60 | eh_frame_hdr 0x6474e550; /* PT_GNU_EH_FRAME, but ld doesn't match the name */ |
61 | } | |
62 | ||
63 | /* | |
64 | * This controls what symbols we export from the DSO. | |
65 | */ | |
66 | VERSION | |
67 | { | |
68 | LINUX_2.5 { | |
69 | global: | |
70 | __kernel_vsyscall; | |
71 | __kernel_sigreturn; | |
72 | __kernel_rt_sigreturn; | |
73 | ||
74 | local: *; | |
75 | }; | |
76 | } | |
77 | ||
78 | /* The ELF entry point can be used to set the AT_SYSINFO value. */ | |
79 | ENTRY(__kernel_vsyscall); |